
API 5DP/5D Drilling, For oil and gas well drilling

GB9948-1988 is for manufacturing of furnace tubes, heat exchangers and pipelines in refineries

Welding Neck Flange,Blind Flange,Lap Joint Flange,Slip On Flange, Socket Weld Flange

45 Degree Elbow,90 Degree Elbow,180 Degree Elbow

Carbon Tee, Socket Tee, Unequal Tee, Short Tee,Equal Tee, Forging Tee, Thread Tee, Copper Tee